CN103432669B - A kind of tracheal intubation or cut pipe sleeve bag gas-filling and pressure tester - Google Patents

Abstract

The invention relates to a tracheal intubation, incision tube cuff inflation and pressure measurement device, which includes a syringe, a communication conversion joint, a pressure release valve and an air pressure gauge. The communication conversion joint includes a gas input port, an air pressure gauge output port and a sleeve Bag output port; the gas input port is connected with the outlet of the syringe, the air pressure gauge output port is connected with the air pressure gauge input port, and the cuff output port is connected with the air inlet of the cuff connected; the pressure release valve is connected between the syringe outlet and the cuff, and can communicate with the cuff during inflation; between the cuff output port and the cuff air inlet The connections between are detachable. Because the present invention adopts the way of injecting the gas, it can accurately judge the intake air volume and pressure according to the amount of each syringe propelling the gas and the barometer, and can prevent air leakage while reducing pressure damage to the airway and improving clinical use. security.

Description

A cuff inflation and pressure measurement device for tracheal intubation or incision tube

technical field

The invention relates to a medical device, in particular to a cuff inflation and pressure measuring device for tracheal intubation and incision tube.

Background technique

Clinically, the artificial airway is very important for the implementation of mechanical ventilation. The artificial airway cuff can not only effectively prevent the leakage of gas but also prevent the patient from aspiration. For patients with tracheal intubation or tracheotomy, the cuff needs to be inflated immediately to seal the airway, which can not only achieve mechanical ventilation, but also protect the airway from aspiration caused by subglottic secretions. However, once the cuff pressure exceeds the perfusion pressure of the tracheal mucosa and submucosa (35cmH ₂ O, 1cmH ₂ O=0.098kPa), it may cause mucociliary atrophy, ulceration, hemorrhage, tracheal stenosis and even tracheoesophageal leakage. Although high-volume low-pressure cuffs have been widely used clinically, the incidence of the above complications has decreased, but tracheal stenosis is still relatively common. At present, most clinicians and nurses usually judge the cuff pressure indirectly by touching the proximal cuff tension of the tracheal intubation, but many studies have found that the intracuff pressure can be accurately judged by touch, and there is no such method in clinical practice. A medical device that can accurately inflate and measure pressure for endotracheal intubation and incision tube cuffs.

Contents of the invention

The technical problem to be solved by the present invention is to provide a device that can inflate the cuff of the tracheal intubation or incision tube and measure the pressure inside the cuff in real time, overcoming the need to inflate the airway cuff in the prior art by touching The tension of the proximal cuff of the endotracheal tube can indirectly judge the pressure of the cuff, which cannot accurately judge the pressure and the shortcomings of overinflation.

The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a tracheal intubation or incision tube cuff inflation and pressure measurement device is characterized in that it includes a syringe, a communication conversion joint, a pressure release valve and an air pressure gauge. The joint includes a three-way valve body, and the three-way valve body includes a valve body and a valve core, and a gas input port, an air pressure gauge output port and a cuff output port are opened on the valve body; the gas input port of the communication conversion joint The mouth is connected with the outlet of the syringe, the output port of the air gauge is connected with the input port of the air gauge, and the output port of the cuff is connected with the air inlet of the cuff; the pressure release valve It is connected between the outlet of the syringe and the cuff, and can communicate with the cuff during inflation, and the connection between the output port of the cuff and the air inlet of the cuff is a detachable connection.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, the volume scale marking of the syringe gradually increases from the root to the outlet of the syringe.

Further, the valve core is set in the valve body, the valve core is rotatable relative to the valve body, and the communication conversion joint also includes a changeover switch, the changeover switch is fixedly connected to the valve core, and can be passed through Turning the transfer switch drives the valve core to rotate.

Further, the transfer switch is provided with a connection indicating device.

Further, the communication indicating device is three mutually perpendicular protrusions arranged on the transfer switch, and one protrusion corresponds to a communication channel in the valve core.

Further, the pressure relief valve includes a valve core part and a valve casing; the valve core part includes a valve stem, a spring and an elastic sealing sleeve; the valve stem includes a rod body, and the rod body is composed of a large diameter part and a small One end of the large diameter portion of the rod body is provided with a large head, the diameter of which is larger than the diameter of the large diameter portion of the rod body; one end of the small diameter of the rod body is provided with a shoulder, which is not connected One side of the rod body is provided with a channel engaging portion, and the diameter of the shoulder is larger than the diameter of the small diameter portion of the rod body and the channel engaging portion; a lock is provided on the side where the channel engaging portion is not connected with the shoulder. The tightening part, the locking part is configured as a key block structure arranged axially on the outer edge of the cylinder, the key block extends over the entire length of the locking part, and the cylindrical part of the locking part The diameter is equal to the diameter of the channel engaging part.

Further, a mounting hole for a pressure relief valve is provided on the outer wall of the channel, and the shape of the mounting hole is configured to provide an axial keyway on the outer edge of the circular through hole. The size of the mounting hole for the pressure relief valve is such that the lock The tight part can slide smoothly on it.

Further, the valve casing includes a bottom and a cylindrical part connected to each other, and a through hole is provided on the bottom, and the through hole of the bottom is sleeved on the valve stem, and makes the outer side of the bottom and the large diameter of the valve stem The head abuts against each other, the spring and the elastic sealing sleeve are sequentially set on the rod body, one end of the spring abuts against the inner side of the bottom of the valve housing, the other end of the spring abuts against the elastic sealing sleeve, and the valve The shell barrel is fitted on the radially outer side of the spring and the elastic sealing sleeve; the end of the valve shell barrel opposite to the bottom is fixed to the outer wall of the channel; the channel engaging portion is engaged through the pressure relief valve installation hole On the outer wall of the channel, one end of the elastic sealing sleeve abuts against the shoulder for axial positioning, and the other end abuts against the spring set on the rod body, the sealing surface of the elastic sealing sleeve is in close contact with the outer wall of the channel, In the non-pressure release state, the sealing of the gas in the channel is realized.

Further, a through hole through which gas passes is provided on the outer periphery of the installation hole of the pressure relief valve, and the through hole is a circular through hole or a long slot-shaped through hole.

Further, the outer wall of the channel is also provided with a pressure relief valve mounting end coaxial with the circular through hole in the pressure relief valve mounting hole, the pressure relief valve mounting end is provided with external threads, and the pressure relief valve Internal threads are provided on the cylinder of the valve casing, and the valve casing is fixed to the outer wall of the channel through the cooperation of the internal and external threads.

Further, the syringe is a 10ml or 15ml syringe.

Further, the pressure scale marking range on the pressure gauge is 0-120 centimeters of water column (cmH ₂ O).

Further, the ideal pressure range in the cuff is 20-30 centimeters of water column (cmH ₂ O), and the scale corresponding to the ideal pressure range is marked in green on the pressure gauge.

Further, the pressure release valve is connected to the channel between the outlet of the syringe and the gas input port of the connection adapter.

Further, the pressure relief valve is connected to the channel between the output port of the air pressure gauge of the communication adapter and the input port of the air pressure gauge.

Further, the pressure release valve is connected to the channel between the cuff output port of the communication adapter and the cuff air inlet.

The tracheal intubation or incision tube cuff inflation and pressure measurement device of the present invention can realize accurate control of the inflation volume, on the one hand monitor the amount of gas pushed in by the syringe in real time, and on the other hand judge the pressure in the cuff by observing the indication of the barometer. Whether the pressure is within the safe range, the highest pressure in the bag can be controlled through the pressure release valve according to different situations, which is accurate and safe. The invention has simple structure, can adapt to different working environments, and is easy to operate.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a tracheal intubation or incision tube cuff inflation and manometry device of the present invention;

Fig. 2 is a schematic structural view of the communication adapter in the device for inflating and measuring pressure of a tracheal intubation or incision tube cuff according to the present invention;

Fig. 3 is a structural schematic diagram of a pressure release valve in a tracheal intubation or incision tube cuff inflation and pressure measurement device of the present invention;

Fig. 3A is an exploded view of a pressure release valve in a tracheal intubation or incision tube cuff inflation and pressure measurement device of the present invention;

Fig. 3B is the K direction view of Fig. 3;

Fig. 4A is a schematic diagram of a communication indicating device for an endotracheal intubation or incision tube cuff inflation and pressure measuring device conversion joint according to the present invention

Fig. 4B is a schematic diagram of the connection of the connection adapter in the state shown in Fig. 4A;

Fig. 5 is another schematic diagram of connection between a tracheal intubation tube or an incision tube cuff inflation and a pressure measuring device connection conversion joint according to the present invention.

Detailed ways

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in Figures 1 and 2, a tracheal intubation or incision tube cuff inflation and pressure measurement device includes a syringe 2, a communication adapter 4, a pressure release valve 5 and an air pressure gauge 3, and the communication adapter 4 It is a three-way valve, preferably a three-way valve with a cylindrical valve core. The three-way valve includes a valve body 41 and a valve core 42. The valve body 41 is provided with a gas input port 401, an air pressure gauge output port 402 and a sleeve. Bag output port 403; the gas input port 401 of the communication adapter 4 is connected with the outlet 201 of the syringe 2, the air pressure gauge output port 402 is connected with the input port of the air pressure gauge 3, and the cuff output port 403 is connected with the air pressure gauge output port 403. The air inlet 102 of the cuff 101 of the tracheal intubation or incision tube is connected; the pressure relief valve 5 is connected between the syringe outlet 201 and the cuff, and can be connected with the cuff during inflation. Balloon 101 is communicated to control the maximum pressure in the cuff. Wherein, the connection between the cuff output port 403 and the air inlet 102 of the cuff 101 is a detachable connection, which is convenient for detaching the cuff inflation and pressure measuring device from the endotracheal intubation tube or incision tube after inflation is completed.

The syringe 2 is a 10ml or 15ml syringe. The volume scale of the syringe 2 gradually increases from the root to the outlet 201, so that the actual inflated volume can be monitored in real time.

Preferably, the pressure release valve 5 is connected to the channel between the syringe outlet 201 and the gas input port 401 of the communication adapter; or the pressure release valve 5 is connected to the air pressure gauge of the communication adapter On the channel between the output port 402 and the input port of the air gauge 3; or the pressure relief valve 5 is connected between the cuff output port 403 of the communication adapter and the air inlet 102 of the cuff on the channel.

As shown in FIG. 2 , the connection conversion joint 4 includes a three-way valve body and a switch 43 , the three-way valve body includes a valve body 41 and a valve core 42 , and the valve core 42 is sleeved in the valve body 41 The spool 42 is rotatable relative to the valve body 41, the spool 42 is fixedly connected to the changeover switch 43, and the spool 42 is driven to rotate by turning the changeover switch 43, so as to realize the connection between the changeover joint 4 and the syringe, air gauge and Connection and disconnection between cuffs. The transfer switch 43 is provided with a connection indicating device 431. As shown in FIG. 4A, the connection indicating device 431 is three mutually perpendicular protrusions arranged on the transfer switch. Corresponding to the communication channel, FIG. 4B shows the position of the valve core 43 and the communication state of the three-way valve in the state shown in FIG. 4A , which can conveniently indicate the communication direction of the corresponding communication channel.

As shown in FIG. 3 , the pressure relief valve 5 includes a valve core part and a valve housing 504 .

The valve core part includes a valve stem 501 , a spring 502 and an elastic sealing sleeve 503 . As shown in Figure 3A, the valve stem 501 includes a stem body 5012, which is composed of a large diameter portion and a small diameter portion connected to each other, and a large head portion 5011 is provided at one end of the large diameter portion of the stem body 5012. The diameter of the big head 5011 is greater than the diameter of the large diameter part of the rod body 5012; one end of the small diameter of the rod body 5012 is provided with a shoulder 5013, and a channel engaging part 5014 is provided on the side of the shoulder 5013 that is not connected to the rod body 5012, The diameter of the shoulder 5013 is greater than the diameter of the small diameter portion of the rod body 5012 and the channel engaging portion 5014; a locking portion 5015 is provided on the side of the channel engaging portion 5014 that is not connected to the shoulder, and the locking portion 5015 The cross-sectional shape of the cylinder is a key shape, that is, a key piece is arranged axially on the outer edge of the cylinder, and the key piece extends over the entire length of the locking portion 5015, as shown in FIG. 3B . The diameter of the cylindrical part of the locking part 5015 is equal to the diameter of the channel engaging part 5014 .

As shown in Figures 3, 3A, and 3B, the valve casing 504 includes a bottom 5041 and a cylindrical portion 5042 connected to each other, and a through hole 5043 is provided on the bottom 5041, and the through hole 5043 of the bottom 5014 is sleeved on the valve stem , and make the outside of the bottom 5041 abut against the big head 5011 of the valve stem, the spring 502 and the elastic sealing sleeve 503 are sequentially set on the rod main body 5012, and one end of the spring abuts against the inside of the bottom 5014 of the valve housing The other end of the spring abuts against the elastic sealing sleeve 503, and the valve housing barrel 5042 is set on the radially outer side of the spring 502 and the elastic sealing sleeve 503; the end of the valve housing barrel 5042 opposite to the bottom 5041 It is fixed on the outer wall of the channel; there is a pressure relief valve installation hole 6 on the outer wall of the channel, the shape of the installation hole 6 is adapted to the shape of the locking part, and it is also in the shape of a key, that is, in the part of the circular through hole An axial key groove is provided on the outer edge, and its size is such that the locking part can slide smoothly thereon. The channel engaging portion 5014 is engaged on the outer wall of the channel through the pressure release valve installation hole 6 . One end of the elastic sealing sleeve 503 abuts against the shoulder 5013 for axial positioning, and the other end abuts against the spring set on the rod body 5012. The sealing surface of the elastic sealing sleeve 503 is in close contact with the outer wall of the channel, and when the pressure is not released In the state, the gas in the channel is sealed. In order to allow the gas in the channel to escape smoothly when the pressure is released, a through hole 7 is provided on the outer periphery of the pressure relief valve installation hole 6, and the shape of the through hole can be a circular through hole or a long slot-shaped through hole ( The figure shows a long slot-shaped through hole), when the pressure release valve is in the closed state, the sealing surface of the elastic sealing sleeve 503 covers these through holes 7, so as to seal the gas in the channel.

In a preferred embodiment, the outer wall of the channel is also provided with a pressure relief valve installation end 8 coaxial with the circular through hole in the pressure relief valve installation hole (as shown in Figure 3). 8 is provided with an external thread, and the pressure relief valve housing barrel 5042 is provided with an internal thread, and the valve housing is fixed to the outer wall of the passage through the cooperation of the internal and external threads.

The pressure release valve 5 has two working states: a state where the pressure can be released and a state where the pressure cannot be released. When the key block on the locking part 5015 and the keyway on the pressure relief valve installation hole 6 are facing each other, the pressure relief valve 5 is in a state capable of releasing pressure. When the gas pressure in the channel is higher than the set value, the channel The gas inside pushes the valve stem 501 to move outward, and the valve stem overcomes the elastic force of the spring to drive the elastic sealing sleeve 503 to move outward together. At this time, the pressure release valve 5 is opened, and the gas in the channel is discharged to the outside of the channel, and the pressure in the channel decreases. When the channel When the internal pressure drops to the set value, the valve stem returns to its original position under the elastic force of the spring to re-seal the gas in the channel. The set value of the pressure in the channel can be adjusted by adjusting the parameters of the spring 502 . When the pressure relief valve 5 is in the state where the pressure can be released, turn the valve stem 501 at a certain angle, then the key block on the locking part 5015 and the keyway on the pressure relief valve installation hole 6 are staggered by a certain angle, and the key block on the locking part 5015 It is stuck on the inner side of the outer wall of the passage, so that the valve stem cannot move outwards, and the pressure relief valve 5 is in a state where the pressure cannot be released, and at this time, a relatively high pressure in the passage can be maintained.

The pressure scale marking range on the pressure gauge is 0-120 centimeters of water column (cmH ₂ O), and the ideal pressure range in the cuff is 20-30 centimeters of water column (cmH ₂ O), corresponding to the ideal pressure range The corresponding scale is marked in green on the pressure gauge.

When the tracheal intubation or incision tube cuff inflation and pressure measuring device of the present invention is in use, the pressure release valve is first set in a state where the pressure can be released or a state where the pressure cannot be released according to different situations. , set the highest pressure value in the channel, that is, the cuff through the pressure release valve (or the highest pressure value is a fixed value that has already been set, this step can be omitted at this time), and then turn the connecting adapter to its three The passages are respectively connected with the syringe, the air gauge and the cuff, and the cuff is inflated through the syringe. During the inflation process, the pressure in the cuff is monitored in real time by observing the pressure value indicated by the barometer; after the syringe is inflated, it is converted by rotating The switch turns the three pathways connected to the conversion joint to a state where they are disconnected from the syringe but communicated with the air gauge and the cuff, as shown in Figure 5, so that the pressure in the cuff of the tracheal intubation or incision tube can be controlled. Test, when the pressure test in the cuff is within the appropriate range (the appropriate range is usually 20-30 cm water column), after the restart process is completed, the cuff air inlet is closed by the switch, and then the device of the present invention is disconnected from the endotracheal tube. Connection to the cuff inlet of the cuff or incision tube.

The tracheal intubation or incision tube cuff inflation and pressure measurement device of the present invention can realize accurate control of the inflation volume, on the one hand monitor the amount of gas pushed in by the syringe in real time, and on the other hand judge the pressure in the cuff by observing the indication of the barometer. Whether the pressure is within the safe range, the highest pressure in the bag can be controlled through the pressure release valve according to different situations, which is accurate and safe. The invention has simple structure, can adapt to different working environments, and is easy to operate.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (14)

1. A tracheal intubation or incision tube cuff inflation and pressure measuring device, characterized in that it comprises a syringe, a communication adapter, a pressure release valve and an air pressure gauge, the communication adapter includes a three-way valve body, the The body of the three-way valve includes a valve body and a valve core, on which a gas input port, an air pressure gauge output port and a cuff output port are opened; the gas input port of the communication conversion joint is connected with the outlet of the syringe , the output port of the air gauge is connected with the input port of the air gauge, and the output port of the cuff is connected with the air inlet of the cuff; the pressure relief valve is connected between the outlet of the syringe and the Between the cuffs, and can communicate with the cuffs during the inflation process, the connection between the output port of the cuff and the air inlet of the cuff is a detachable connection; The pressure relief valve includes a valve core part and a valve housing; the valve core part includes a valve stem, a spring and an elastic sealing sleeve; One end of the large diameter part of the rod body is provided with a large head, the diameter of the large head is larger than the diameter of the large diameter part of the rod body; one end of the small diameter of the rod body is provided with a shoulder, and the shoulder is not connected to the rod body One side of the channel engaging part is provided, and the diameter of the shoulder is larger than the diameter of the small diameter part of the rod body and the channel engaging part; a locking part is provided on the side where the channel engaging part is not connected with the shoulder , the locking part is configured as a key block structure arranged axially on the outer edge of the cylinder, the key block extends over the entire length of the locking part, and the diameter of the cylindrical part of the locking part is the same as The diameters of the engaging parts of the channels are equal; A mounting hole for a pressure relief valve is provided on the outer wall of the channel, and the shape of the mounting hole is configured to provide an axial keyway on the outer edge of a circular through hole. The size of the mounting hole for the pressure relief valve is such that the locking part Can slide smoothly on it. 2 . The cuff inflation and pressure measuring device for tracheal intubation or incision tube according to claim 1 , wherein the volume scale mark of the syringe gradually increases from the root to the outlet of the syringe. 3 . 3. A tracheal intubation or incision tube cuff inflation and pressure measuring device according to claim 1, characterized in that, the valve core is set in the valve body, and the valve core is opposite to the valve body. It is rotatable, and the connection conversion joint also includes a switch, which is fixedly connected with the valve core, and the valve core can be driven to rotate by turning the switch. 4 . The cuff inflation and pressure measuring device for tracheal intubation or incision tube according to claim 3 , characterized in that, the switch is provided with a communication indicating device. 5. A tracheal intubation or incision tube cuff inflation and pressure measuring device according to claim 4, characterized in that, the connection indicating device is three mutually perpendicular protrusions arranged on the switch , a protruding portion corresponds to a communication channel in the valve core. 6. A tracheal intubation or incision tube cuff inflation and pressure measuring device according to claim 1, characterized in that, the valve housing includes a bottom and a cylinder connected to each other, and a through hole is provided on the bottom. hole, the through hole at the bottom is set on the valve stem, and the outside of the bottom is in contact with the big head of the valve stem, the spring and the elastic sealing sleeve are successively set on the stem body, and the spring One end abuts against the inner side of the bottom of the valve housing, the other end of the spring abuts against the elastic sealing sleeve, and the valve housing cylinder part is sleeved on the radially outer side of the spring and the elastic sealing sleeve; the valve housing cylinder part The end opposite to the bottom is fixed on the outer wall of the channel; the engaging part of the channel is engaged on the outer wall of the channel through the installation hole of the pressure release valve, and one end of the elastic sealing sleeve is axially positioned against the shoulder , the other end abuts against the spring set on the rod body, the sealing surface of the elastic sealing sleeve is in close contact with the outer wall of the channel, and the gas in the channel is sealed when the pressure is not released. 7. A tracheal intubation or incision tube cuff inflation and pressure measuring device according to claim 6, characterized in that, a through hole for gas to pass is arranged on the outer periphery of the pressure release valve installation hole, and the The through hole is a circular through hole or a slotted through hole. 8. A tracheal intubation or incision tube cuff inflation and pressure measuring device according to claim 7, characterized in that, the outer wall of the channel is also provided with a circular through hole in the installation hole of the pressure release valve A coaxial pressure relief valve installation end, the pressure relief valve installation end is provided with external threads, and the pressure relief valve casing is provided with internal threads, and the valve casing is fixed to the on the outer wall of the channel. 9 . The tracheal intubation or incision tube cuff inflation and pressure measurement device according to any one of claims 1 to 8 , wherein the syringe is a 10 ml or 15 ml syringe. 10. An endotracheal intubation or incision tube cuff inflation and pressure measurement device according to any one of claims 1 to 8, characterized in that the pressure scale on the pressure gauge indicates a range of 0-120 cm water column . 11. A kind of tracheal intubation or incision tube cuff inflation and pressure measuring device according to claim 10, characterized in that, the ideal pressure range in the cuff is 20-30 centimeters of water column, and the ideal pressure The scale corresponding to the range is marked in green on the pressure gauge. 12. An endotracheal intubation or incision tube cuff inflation and pressure measurement device according to any one of claims 1 to 8, characterized in that the pressure release valve is connected between the outlet of the syringe and the communication switch on the channel between the gas inlets of the fittings. 13. A tracheal intubation or incision tube cuff inflation and pressure measurement device according to any one of claims 1 to 8, characterized in that the pressure release valve is connected to the air pressure gauge output of the communication conversion joint port and the input port of the barometer on the channel. 14. An endotracheal intubation or incision tube cuff inflation and pressure measurement device according to any one of claims 1 to 8, characterized in that the pressure release valve is connected to the cuff output of the communication adapter on the channel between the port and the inlet port of the cuff.